Ice Princess - Disappearing Hat
In the scene, towards the end of the movie, when Casey skates on the pond near her house she is wearing a striped hat. When she is skating, she falls, them Teddy drives up on the Zambone. Her hat is lying on the ice, above her head. When it flashes back, from showing Teddy, the hat is gone. She stands up and the hat is not to be seen again!